Normalize (or rename) headers

Created by: pudo

This is specifically with regards to csvsql, where loading a CSV file with Some manually entered - header (TM) will give you a data structure that is really hard to query. But I think having the ability to essentially slugify and transliterate a headers would be useful for other tools like csvclean aswell.

I tried looking into how this could be done, and it looks like parse_column_identifiers (here) could be an appropriate place, but that would require pulling the option through many intermediate functions. Is there a better place?